1) The basic. A magneto and a crank. No generator, no lights, no battery.
2) Option 1. A magneto and a crank for the engine. For lights, Bosch made a system with a generator to to run lights, but no battery so the lights would only burn while the engine was running. Never saw one with it, but I'd expect the lights went up and down to some degree with engine speed, like on a car with a bad battery running off the alternator.
3a) Generator, battery, starter (crank cleverly concealed as a backup), lights and magneto. Battery was to turn the starter and level the current to the lights They (the lights) ran off the battery, not off the genny as in the Bosch system, and as long as everything wa in good order, wouldn't flicker or flare and dim as much. Engine ignition was still from the mag and completely isolated from the battery and charging system.
3b) Generator, battery, starter (still a backup crank) lights and battery/coil ignition. Difference from 3a is that the ignition is now a part of and therefore dependent on the same electrical sysem that runs everything else.
I may be a little screwed up on the particulars of this, but I my understanding of the concept is that the coil in a battery ignition is actually two coils, one inside the other. They are wound at sufficiently different rates that they are magnetically/electrically different. It is the difference, when released (think back to our discussion of how the charge dumps when your points open) that makes the spark that winds up at the spark plug. If the inside of the two coils were on a spindle, you'd have a motor that would transfer/release the energy by turning the spindle instead of releasing a spark.
A magneto works similarly, except that instead of two coils, it has a permanent magnet in place of the outside coil, and the turning of the magneto excites a smaller coil inside the magnet. Same effect except the magnetism comes from the permanent magnet rather than a magnetic field created by the outer coil on the battery system. Where I'm off base, I'll happily be corrected and grateful for the learning experience.
I learned some, too, on this whole thread. I hadn't given any thought to the potential for a stronger spark possible with the voltage/amperage off a battery vs. the mag. Nor to the improved spark timing from the centrifugal advance on the battery distributor. I'm actually kind of curious now whether the function of the impulse coupler prohibits a better spark advance system on the mag, or if the engineers just moved on to something better.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Talk of the Town: Repairin a Gas Tank - by Staff. This interesting discussion is from the Tool Talk Discussion Forum. Remember that safety is your first priority - make sure you know what you are doing before attempting a potentially dangerous activity!
... [Read Article]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
